Rename existing nonpreserving reallocs to reset, add reset to SkAutoMalloc, use reset in GrBufferAllocPool

Review URL: http://codereview.appspot.com/4951058/


git-svn-id: http://skia.googlecode.com/svn/trunk@2215 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGLTexture.cpp b/gpu/src/GrGLTexture.cpp
index be7a0f1..e302694 100644
--- a/gpu/src/GrGLTexture.cpp
+++ b/gpu/src/GrGLTexture.cpp
@@ -151,7 +151,7 @@
             if (flipY) {
                 src += (height - 1) * rowBytes;
             }
-            char* dst = (char*)tempStorage.realloc(trimSize);
+            char* dst = (char*)tempStorage.reset(trimSize);
             for (int y = 0; y < height; y++) {
                 memcpy(dst, src, trimRowBytes);
                 if (flipY) {